https://learn.microsoft.com/en-us/uwp/api/windows.media.speechsynthesis.speechsynthesizer.synthesizessmltostreamasync?view=winrt-22000
SpeechSynthesizer.SynthesizeSsmlToStreamAsync(String) Method (Windows.Media.SpeechSynthesis) -...
Asynchronously generate and control speech output from a Speech Synthesis Markup Language (SSML) Version 1.1 string.
windows mediastringmethod